Louis bresson



No. 6l2,943.- Patented Oct. 25,- I898. L. BRESSON.

ELECTRIC FURNACE.

(Application filed Feb. 8, 1898.)

(No Model.)

w: worms were co, PHOTILLITWJ WASmNBTON, a. c

. of the crucible.

UNITED STATES PATENT OFFICE.

LOUIS BRESSON, OF LYONS, FRANCE.

ELECTRIC FURNACE.

SPECIFICATION forming part of Letters latent No. 612,943, dated October25, 1898.

Application filed February 8, 1898. Serial No, 669,532. (No model.)

To all whom it may concern.-

Be it known that I, LOUIS BREssoN, a citizen of the Republic of France,residing at Lyons, France, have invented certain new and usefulImprovements in Electric Furnaces, (for which I have obtained a patentin France,dated November 10,1897,No. 268,610,) of which the following isa full, clear, and exact specification.

The object of my invention is to provide an oscillating electric furnaceto be used for the production of carbids, and more especially forcalcium carbid.

The invention is illustrated in the accompanying drawings, in whichFigure 1 represents a vertical section through the axis of the furnace.Fig. 2 represents an exterior view of the same.

The furnace is composed of a crucible A, of an ovoid form, built of purecompressed magnesia. This crucible is fixed in a shell B of like form,made of steel plate or cast-iron. The crucible is closed by a cover offire-clay having the form of a truncated cone 0, also covered with anenvelop of wrought or cast iron. The said cover is bolted on the shell BOn the top of the cover stands a hopper D, turning on its base D aroundits axis. Through the center of this hopper passes a chimney E, ofcast-iron, the use of which is to carry 0% the hot gases. The hopper D,hermetically closed, receives the ground material in order to absorb asmuch as possible the heat escaping from the furnace through the chimneyE. The base D 'of the hopper D has openings I I, which coincide withsimilar ones made in the top of .the furnace when the hopper is moved ina circular way by using the handle D". It is by these means that thematerial is introduced into the'furnace, preventing the oxidizing actionof the air.

On each side of the crucible is fixed a circular disk K, which can turnbetween four grooved rollers F, fixed on the frame X of the furnace. Thesaid disks constitute two trunnions of a large diameter, allowing thetilting of the furnace in order to empty it by a lateral opening P.

The electrodes R R, of carbon, penetrate inside the furnace by elongatedopenings L, made in the disks K, each one of them being supported by asocket J, through which it can glide by means of a rack operated by apinion Z. Each socket J is supported by two rods V and S, attached attwo differentpoints to a lever U, so that when the said lever isoperated the corresponding extremity of the carbon moves itselfVertically, as shown in dotted lines in Fig. 1.

The levers U on the right and left are made to move in unison by therods H H and the bent levers I-I,.so that the working of one or theother produces, in effect, the raising of the two ends of the twocarbons at the same time, leaving between them always the same distanceand maintaining, therefore, the stability of the arc.

The rods V are extensible, and their length can be changed by a pinionV, acting on a rack so that the two carbons can be brought into contactin order to strike the arc and to regulate its length.

After the above explanations it is very easy to understand the workingof the furnace.

The ground materials in the hopper D are introduced by the working ofthe handle D proportionately to the ascending of the material in thecrucible, and the carbons are lifted by working the levers U so as tokeep the are over the mass in fusion until the finishing of theoperation,when the carbons are in the horizontal position. At thismoment the furnace can be turned over and emptied without eveninterrupting the current, and another operation can begin again in thefurnace while it is still warm. One can apply to one of the pinionsV,which regulate the bringing nearer of the carbons, an electricgovernor consisting of a small electric motor crossed by a shunt-currentand working, as above described, for the regulation of the arc-lamps.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an electric furnace to be used for the production of carbids, anoscillating crucible with means for operating the same, a covertherefor, a hopper surmounting the cover, a chimney affording passage tothe products of combustion, electrodes projecting through axial openingsin the sides of said crucible, and connections thereto, substantially asdescribed.

2. In an electric furnace an oscillating cru- In Witness whereof I havehereuntoset my cible With means for operating it, carbon elechand inpresence of two Witnesses. trodes isolated from the body of the furnaceand projecting into the crucible, and means 5 for supporting saidelectrodes, and for raising XVitnesses:

their extremities Without changing the length YVIN RABILLOUS, of thearc, substantially as described. GASTON JEANNIAUX.

LOUIS BRESSON.

